5.Are pure solids included in equilibrium expressions? Explain your answer.
Answer:
Pure solids or liquids are excluded from the equilibrium expression because their effective concentrations stay constant throughout the reaction. The concentration of a pure liquid or solid equals its density divided by its molar mass.
Explanation:
Hope this helps!!!
Titanium metal is used as a structural material in many high-tech applications such as jet engines. What is the specific heat of titanium in J/g°C if it takes 99.7 J to raise the temperature of a 34.7 g block by 5.20°C?
Answer:
0.553 J/g°C
Explanation:
From the question given above, the following data were obtained:
Heat (Q) required = 99.7 J
Mass (M) = 34.7 g
Temperature change (ΔT) = 5.20 °C
Specific heat capacity (C) =?
Thus, we can obtain the specific heat capacity of titanium as follow:
Q = MCΔT
99.7 = 34.7 × C × 5.20
99.7 = 180.44 × C
Divide both side by 180.44
C = 99.7 / 180.44
C = 0.553 J/g°C
Therefore, the specific heat capacity of titanium is 0.553 J/g°C.
name the process of separating into immiseible liquid?
Answer:
Decantation
Explanation:
Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.
if you started with 2.34 grams of methane and 8.32 grams of oxeygyn and the combustion reaction went to completion how many grams of CO2 would be produced
Answer:
Mass of CO₂ produced = 5.72 g
Explanation:
Given data:
Mass of methane = 2.34 g
Mass of oxygen = 8.32 g
Mass of CO₂ produced = ?
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Number of moles of methane:
Number of moles = mass/molar mass
Number of moles = 2.34 g/ 16 g/mol
Number of moles = 0.146 mol
Number of moles of oxygen:
Number of moles = mass/molar mass
Number of moles = 8.32 g/ 32 g/mol
Number of moles = 0.26 mol
Now we will compare the moles of carbon dioxide with oxygen and methane.
CH₄ : CO₂
1 : 1
0.146 : 0.146
O₂ : CO₂
2 : 1
0.26 : 1/2×0.26 = 0.13 mol
Less number of moles of CO₂ are produced by oxygen thus oxygen will react as limiting reactant.
Mass of CO₂:
Mass = number of moles × molar mass
Mass = 0.13 mol × 44 g/mol
Mass = 5.72 g
HELLLLLLLP ASAP ITS DUE TODAAAAY :(
Answer:
the answer is j
Explanation:
Answer:
J. All of the above
Explanation:
Since the sun is tilted on it's axis, then the rays of the sun fall on the equator, directly, and that causes it to heat the equator more than the other regions.
Sometimes the sun's rays are on two tropics, Cancer and Capricorn, and that causes the Earth to heat unevenly, which causes wind and ocean currents to form.
Multiple lines between two atoms in a covalent lewis dot diagram mean:
A That there are more atoms involved
B That multiple electrons are shared between the atoms
C That the atoms are not bonded
D That the bond is easier to break
PLEASE HELP
In the equation 2KCIO3 → 2KC1 + 302, how many moles of oxygen are produced when 3.0 mol of KCIO3 decompose completely?
Moles of Oxygen produced : 4.5 moles
Further explanationA reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
The reaction coefficient shows the mole ratio of the reactants and products
Reaction
2KCIO₃ → 2KCl + 30₂
moles of KCIO₃ = 3
From equation, mol ratio of KCIO₃ : O₂ = 2 : 3, so mol O₂ :
[tex]\tt mol~O_2=\dfrac{3}{2}\times 3=4.5[/tex]
PLZ HELP, NO MESSING AROUND, WILL GIVE BRAINLIEST!
Covalent bond is a type of chemical bond which is due to the sharing an electron from each and every atom that is participating in the bond.
Ionic Bond:Ionic bond is a type of bond which is formed due to the complete donation of an electron from one atom to another.
Ionic bond is formed between metals and non-metals. The group which provide the Metal are IA and IIA i.e. S block elements. The group which mostly provide non-metal is VII A i.e. halogens. The Metals give up their ONLY Valance shell electron which is accepted by the Non-metal. This results in formation of ions, The Metals gets the positive charge thus called cation and The non-metal gets a negative charge thus called anion. These Positive and Negative ion attract each other resulting in the formation of IONIC BOND.
_____________________________________The Ionic bond is formed between The metal and non metal because, the metals have low ionization energy due to which the valence shell is ejected out easily, and The Non-Metals have high electron affinity which means that they attract an electron with greater force because they need one electron to complete their octet. As the non metal has high electron affinity and metal have low electron affinity thus the electronegativity difference between the non metal and metal is more than 2 thus they make ionic bond.
_____________________________________Rule of Electronegativity:Electronegativity is the tendency of an atom to attract shared pair of electron. If there is electronegativity difference between the two atom more than 2 then it makes IONIC BOND. If the electronegativity difference is less than 2, it makes COVALENT BOND.
_____________________________________Question:The question says, the KCl has ionic bond but HCl has covalent bond, why?
Answer:Answer is that KCl has electronegativity difference between K and Cl atom more than 2 thus it forms ionic bond. H and Cl has electronegativity difference of less than 2 thus it makes Covalent Bond. K donates its valence electron completely to the Chlorine atom because chlorine has much more electronegativity than potassium(K). H shares an electron with chlorine, it is not completely donated. H has pair of electron for sometime and chlorine has pair of electron for sometime, It is because the Chlorine and Hydrogen has less difference of electronegativity so they attract with almost same electronegativity.
_____________________________________Best Regards,'Borz'If you help me quickly i will give you 100 point
Answer:
Ovary
Explanation:
The ovaries are organs that lie to the upper right and left of the uterus. They produce, store, and release eggs into the fallopian tubes in the process called ovulation
Teresa has a $100 gift card to her favorite restaurant. Each day, she uses her gift card to buy the same lunch for $8.50. Colin has a $75 gift card to the same restaurant. His lunches cost $6 each. For what numbers of lunches will Teresa's gift card balance be greater than Colin's gift card balance?
Answer:
No
Explanation:
If Teresa has a $100 Gift Card and her lunch is $8.50 everyday, $8.50 x 10 = 10 Lunchs for a total of $85 then add one more which = 11 Lunchs for a total of 93.50, this means she can not buy another lunch, Colin has a $75 gift card and his lunch is $6 everyday, so $6 x 10 = $60 for a total of 10 lunchs plus add 2 which is 12 lunchs for a total of $72 which means No Teresa's Gift Card Will Not Be Greater In Lunchs.
Which sphere is dependent on all the other spheres in order to exist?
hydrosphere
lithosphere
atmosphere
biosphere
Answer:
biosphere
Explanation:
Living things need water (hydrosphere), chemicals from the atmosphere, and nutrients gained by eating things in the biosphere.
Which of the following changes on different celestial objects due to the force of gravity?
Mass
Weight
Height
Width.
This chart shows descriptions of the atoms for four different substances.
Which substance is a solid?
Object 1
Object 2
Object 3
Object 4
The chemical process in which small organic molecules called monomers bond together to form a chain is called A) production B) polymerization C technology D) modification
Help ASAP
Avocados have a pH of 6.27. Avocados are categorized as...
O Base
O An Acid
O Neutral
Answer:
Base
Explanation:
How many total valence electrons are available for the Lewis Dot structure of H2S?
Answer:
8 Valence Electrons
Explanation:
There are 2 atoms of Hydrogen and 1 atom of Sulfur in the compound. Each Hydrogen atom has 1 electron (which is the valence electron).Sulfur has six valence electrons. Therefore, there is a total of eight valence electrons in H2S.Lipase is an enzyme that breaks down the fat in food molecules into smaller molecules. Which of the following best describes the function of lipase?
Change the following word equation into a formula equation AND balance it. Iron(III) carbonate --> Iron(III) oxide + Carbon dioxide
Will give brainliest blus 100 points
Is there currently a cure for HIV
Answer:
No
Explanation:
There are vaccines, to prevent it, made by Dr. Fauci, but no cure
what is the chemical name for carbon?
A weather balloon is rising and is about to reach 30,000 ft. The pressure of the helium gas inside the balloon
measures 280 mmHg.
5 pts
6. Will the balloon explode once it reaches 30,000
ft? Your answer should be supported with DATA
from image to the left AND a particle diagram.
45.000
0.15 atm
(1.00 atm = 760.0 mmHg)
40.000
L020 atm
-57°C
Hint: Draw a particle diagram showing the
pressure helium gas inside the balloon AND the
atmospheric gas surrounding the balloon
35.000
025 atm
30.000
0.30 atm
- 45°C
25.000
0.40 atin
Altitude (ft)
- 35 °C
Atmospheric Pressure
20.000
0.50 atm
15.000
0.60 am
10.000
-5°C
070 at
5.000
5°C
0 85 atm
Sea level
17°C
00 am
Answer:Twice a day, every day of the year, weather balloons are released simultaneously from almost 900 locations worldwide! This includes 92 released by the National Weather Service in the US and its territories. The balloon flights last for around 2 hours, can drift as far as 125 miles away, and rise up to over 100,000 ft.
Explanation:
Why is a map considered a model?
Answer:
Every map is a representation of reality, thus a model in the broadest sense. Sometimes mapping is distinguished from modelling by stating that mapping is a simple representation of reality, while modelling is trying to cover more complexity in reality.
Explanation:
What do the two arrows in the diagram most likely represent?
O radiation
O photosynthesis
cellular respiration
Oenergy transfers
A soccer ball was kicked it had the mass of .42 kg and accelerated at 25m what is the force
Please answer correctly !!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!
Answer:
C
Explanation:
Hope this helps Mrs. or Sir
Explain how the rock cycle works.
Be sure to include the name of each type of rock in your description.
(Igneous rock, metamorphic rock, and sedimentary rocks)
I need help, and fast, please.
How many moles of H3PO4 are contained in 150.0 mL of 18.1 M H3PO4?
Answer:
Number of moles = 2.72 mol
Explanation:
Given data:
Number of moles of H₃PO₄ present = ?
Molarity of solution = 18.1 M
Volume of solution = 150.0 mL (150/1000 = 0.15 L)
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
By putting values,
18.1 M = number of moles / 0.15 L
Number of miles = 18.1 M × 0.15 L
Number of moles = 2.72 mol
using your personal feelings to explain or describe is being..
Answer:
deep ............................
Answer:
( A Heart) fragile clueless of what love is then one day... somebody comes, somebody comes and you get a feeling a feeling of happiness a feeling of pure love not like any crush! Then one day... you lose them, you lose them and they are gone at first you feel cold like a piece of you just left the person that mad you feel this joy! You were just having another normal day but then you met then after that day you were happy but that one person! That one person made you So happy if you lost them you cant imagine how you could go what was life Before. so the second they leave it feels like your heart lost a piece that could only be filled with love! over the days your'e heart starts to feel numb and feel so lost you wonder and wonder. ( The heart)
Explanation
What is the mass of 7.00 moles of H2O2
Answer:
0.206 mol H₂O₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
7.00 moles H₂O₂
Step 2: Identify Conversions
Molar Mass of H - 1.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of H₂O₂ - 2(1.01) + 2(16.00) = 34.02 g/mol
Step 3: Convert
[tex]7.00 \ g \ H_2O_2(\frac{1 \ mol \ H_2O_2}{34.02 \ g \ H_2O_2} )[/tex] = 0.205761 mol H₂O₂
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
0.205761 mol H₂O₂ ≈ 0.206 mol H₂O₂
Answer:
238.14
Explanation:
2 H + 2O
2(1.01) + 2(16.00) = 34.02
34.02*7 = 238.14
238.14